A Study on the Dynamic Characteristics of Free-Friction Stroke Damper by Finite Element Method

유한요소법을 이용한 Free-Friction Stroke 댐퍼의 동특성 해석

  • 구희춘 (부산대학교 대학원 기계공학부) ;
  • 이재욱 (부산대학교 대학원 기계공학부) ;
  • 유완석 (부산대학교 기계공학부)
  • Published : 2009.12.01


Various types of damper are usually applied to reduce noise and vibration for mechanical systems. Especially, for washing machines, the free-friction stroke damper is installed. The behavior of the free-friction stroke damper has nonlinear characteristics such as hysteresis and viscoelastic properties because of its foam material. First of all, the dynamic experiments were carried out by using a MTS machine to find characteristics of the free-friction stroke damper. And the simulation model of the free-friction stroke damper and characteristics of a foam material were evaluated by using optimization technique. To make a good simulation model which can show the dynamic characteristics, it is important to understand the working mechanism of the damper. The Finite Element Method (FEM) technique can help us instinctively understand the damping phenomenon under operating conditions, because we can observe the condition of damper at every step in the simulation by using it. Also, by changing factors, we can comprehend the variation of characteristics of damper. So, in this paper, a study on the dynamic characteristics of free-friction stroke damper by FEM is focused on. Finally, the possibility which physical experiments can be replaced into simulations is shown.


Finite Element Method;FreE-Friction Stroke Damper;Optimization Technique;Washing Machine


  1. Park, B. C. and LG Electronics Inc., 2005.02.28, Korean Intellectual Property, 1020050016475
  2. Park, J. W., and LG Electronics Inc., 2003.05.13, Korean Intellectual Property, 1020030030298
  3. Shim, C. S., and LG Electronics Inc., 2004.02.23, Korean Intellectual Property, 1020040011826
  4. Haw, Y. N., and LG Electronics Inc., 2003.10.06, Korean Intellectual Property, 1020030069206
  5. Haw Y. N., and LG Electronics Inc., 2003.10.06, Korean Intellectual Property, 1020030069197
  6. Shim, C. S., and LG Electronics Inc., 2004.07.13, Korean Intellectual Property, 1020040054426
  7. Shim, C. S., and LG Electronics Inc., 2004.07.13, Korean Intellectual Property, 1020040054423
  8. Oh, H., and Lee, U., 2004, "Dynamic Modeling and Analysis of the Washing Machine System with an Automatic Balancer," Trans. of KSME, Vol. 28, pp. 1212-1220
  9. Lyu, J. C., Nho, G. H., Chung, B. S., Lee, J. H., Jung, S. W. and Yoo, W. S., 2008, "Suggestion of MSTV (Modified-Stick-Transition-Velocity) model for hysteretic damping mechanism," Journal of Mechanical Science and Technology, Vol. 22, pp. 1305~1312
  10. Yang, B., Lee, J., Ha, J. and Ahn, B., 1994, "Optimal Design of Air Dampers Applied on Wash Machines," Trans. of KSME, Vol. 18, pp. 2477-2485
  11. Lee, J., Jo, S., Kim, T. and Park, Y., 1998, "Modeling and Dynamic Analysis of a Front Loaded Washing Machine with Ball Type Automatic Balancer," Trans. of KSNVE, pp. 670-682
  12. Bae, S., et al, 2002, "Dynamic analysis of an automatic washing machine with a hydraulic Balancer," Journal of Sound and Vibration, Vol. 257, pp. 3-18
  13. Jung, S. W., 2009, "Dynamic analysis of a free-friction stroke damper", Pusan National University Master's Thesis
  14. HyperWorks User Manual, Altair. R
  15. Abaqus Documentation, SIMULIA Cop., 2008
  16. Kim, W. D., 1999, "Design and Analysis of the Hyperelastic Rubber Mechanical Components"
  17. VisualDOC User Manual, VR&D Cop., 2004

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